SLOA349 March   2025 TAS6584-Q1 , TAS6684-Q1

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
  5. 2SDOUT Configuration
    1. 2.1 SDOUT – I2S Configuration
    2. 2.2 SDOUT – TDM Configuration
  6. 3SDOUT Connection in Multi-Device System
  7. 4Output Current and Voltage Calculation
  8. 5Summary
  9. 6References

4 Output Current and Voltage Calculation

TAS6x84-Q1 output current and voltage predict can be measured through SDOUT data. Peak output voltage at full scale digital input is 43V/FS, and peak output current at full scale digital input is 30.9A/FS. The calculation of the output current and voltage predict is:

Equation 1. Isense peak = Current SDOUT × 30.9(A)  
Equation 2. Isense rms = Current SDOUT × 30.9 2 (A)  
Equation 3. Vpredict peak = Voltage SDOUT × 43(V)  
Equation 4. Vpredict rms = Vpredict SDOUT × 43 2 (V)  

The load impedance is also can be calculated through output current and voltage predict. Below is one example of calculation of current and voltage predict according to SDOUT data. Obtain the CurrentSDOUT and VoltageSDOUT data from designated slots with the scaling factors,

Equation 5. Current SDOUT = 4.31(%FS)

and

Equation 6. Voltage SDOUT = 12.6(%FS)

The output current, voltage predict and load impedance value are:

Equation 7. Isense peak = 0.0431 × 30.9 = 1.332(A)  
Equation 8. Isense rms = 0.0431 × 30.9 2 = 0.942(A)  
Equation 9. Vpredict peak = 0.126 × 43 = 5.42(V)  
Equation 10. Vpredict rms = 0.126 × 43 2 = 3.83(V)  
Equation 11. R load = Vpredict rms Isense rms = 4.066 (Ω)